I am new to Linux and am not sure how to get the latest version of KDE. I have seen this page as well as this one but short of downloading each file individually (at which point I wouldnt know what to do with the files anyway) I am not sure how to go about it. I am sure there is a quick code I can punch in to Terminal.

Having a lot of bugs so need to do this asap. (Opengl not working for example).

in ubuntu/mint the latest kde available is (at time of writing) 4.9.0; kubunt-backport is the fastest place to get pre-compiled kde (usually within days), some other more bleeding edge distros offer the latest quicker.